Water resources data for Iowa for the 1997 water year consists of records of stage, discharge, and water quality of streams; stage, and/or contents of lakes and reservoirs; ground water levels and water quality of ground-water wells. This report contains discharge records for 31 gaging stations; stage or contents for 3 lakes and reservoirs; water quality for 1 stream-gaging station; sediment records for 3 stream-gaging stations; ground-water levels for 177 observa-tion wells, ground-water quality data for 90 municipal wells, and precipitation water quality for 2 sites. Also included are data for 34 crest-stage partial record stations. Additional water data were collected at various sites, but are not part of the systematic data collection program and are published as miscellaneous discharge and miscellaneous water-quality analyses.